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PICList Thread
'MAX232'
1998\02\14@181426 by tsk196

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Hello engineers;
       I would like to buy a max232. But there are lots of
them in the market.
       I have some of them on my mind and don't know which
to choose. Can you tell me what's the difference and which is
the best? I'm using for one transmit and one receive. And
I'm concerned if they are using 5volts.
       Here are some of them on my mind:
       MAX233CPP
       MAX232CPE
       ICL232CPE
       HIN232CP/CB/IB

----------------------
siong
spam_OUTtsk196TakeThisOuTspamsoton.ac.uk

1998\02\14@202638 by Jon Hylands

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On Sat, 14 Feb 1998 23:10:09 +0000, siong <.....tsk196KILLspamspam@spam@SOTON.AC.UK> wrote:

> Hello engineers;
>         I would like to buy a max232. But there are lots of
> them in the market.

If you want to run on 3 volts, you can check out:

MAX218, MAX212, MAX562, MAX3241, MAX563, MAX3222, MAX3232

These are all 3 volt RS-232 chips that Maxim makes.

The MAX218 and 212 say they are "true RS-232", whatever that means. And the
218 can run on as little as 1.8 volts, with 1.9 mA supply current.

The 218, 563, 3222, and 3232 each have 2 transmitters and 2 receivers.

Basically, if I were getting one, I'd opt for the MAX218. It can do 235
Kbps, and it requires 3 external capacitors.

Later,
Jon

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1998\02\16@070744 by Keith Howell

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siong wrote:
>
> Hello engineers;
>         I would like to buy a max232.
> siong
> .....tsk196KILLspamspam.....soton.ac.uk

I prefer the MAX202. This is like the MAX232 but uses 100nF caps instead
of 1uF. This shrinks board space and component price.

A point worth noting: the +/-10V charge pumps on these chips usually
work well, but in one project I got comms errors at high baud rates
(115.2kBaud). I had used two common length (c. 6ft) serial cables to
link my PC and the gadget. Using just one, the errors vanished. I expect
the pumps do not have enough power to drive cables much longer than the
RS232 spec allows.

These rates may not occur with PICs (yet!) but long cables may well do.


'MAX232'
1998\03\10@170504 by Chris A Brainerd
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I need to know how much a MAX232 costs but I've been unable to find them,
not even in Mouser. Do they have another name that I should look for? Or
are there any equivelent chips? Thanks

       Chris


_____________________________________________________________________
I'm, like, a product, OK, of american, you know, education, all right?
EraseMEDJ_Ramenspam_OUTspamTakeThisOuTjuno.com

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1998\03\10@172513 by hansen

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Chris A Brainerd wrote:
>
> I need to know how much a MAX232 costs but I've been unable to find them,
> not even in Mouser. Do they have another name that I should look for? Or
> are there any equivelent chips? Thanks
>
>         Chris
>
> _____________________________________________________________________
> I'm, like, a product, OK, of american, you know, education, all right?
> DJ_Ramenspamspam_OUTjuno.com
>
> _____________________________________________________________________
> You don't need to buy Internet access to use free Internet e-mail.
> Get completely free e-mail from Juno at http://www.juno.com
> Or call Juno at (800) 654-JUNO [654-5866]

Two sources are JDR micro (http://www.jdr.com) and bg micro (http://www.bgmicro.com)
They are under $3 at both places.

JAH

1998\03\13@172734 by Alex Torres

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> I need to know how much a MAX232 costs but I've been unable to find them,
> not even in Mouser. Do they have another name that I should look for? Or
> are there any equivelent chips? Thanks

In our country MAX232' price is about $7-8, but try to use it's clone -
ADM232 (or 202), it is more cheaper - $2.50

Alex Torres, Kharkov, Ukraine (exUSSR)
@spam@altorKILLspamspamchat.ru
2:461/28@FidoNet
www.geocities.com/SiliconValley/Lab/6311

1998\03\15@060952 by Anthony Mizon

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In message <KILLspam199803132156.AAA13477KILLspamspamchat.ru>, Alex Torres <RemoveMEaltorTakeThisOuTspamCHAT.RU>
writes
>> I need to know how much a MAX232 costs but I've been unable to find them,
>> not even in Mouser. Do they have another name that I should look for? Or
>> are there any equivelent chips? Thanks
>
> In our country MAX232' price is about $7-8, but try to use it's clone -
>ADM232 (or 202), it is more cheaper - $2.50
>
>Alex Torres, Kharkov, Ukraine (exUSSR)
>spamBeGonealtorspamBeGonespamchat.ru
>2:461/28@FidoNet
>http://www.geocities.com/SiliconValley/Lab/6311

If you need regular supply of MAX232s and PIC chips in general you
should check out cornhill association here in England - 16C84's are
£2.00 and MAX 232's are about £1.50 it may be worth paying the postage.


--
Anthony Mizon

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